Talking about the leaked interface, as you can see, Samsung has taken some elements from HTC’s Blinkfeed but mostly it is typographical and iconography related changes. You still have the same five icons on the bottom, however the lock-screen looks a little different. We will have to wait for more such leaks to get a clear idea of how much of a change Samsung planning to include in the next version of TouchWiz (if it is still called that in the new version).
There are no other new details available at this point. To remind you, Samsung Galaxy S5 is rumoured to arrive in May with top of the line specs, such as QHD display, new Exynos processor, 3GB of RAM, 16MP rear camera, Android 4.4 and 32GB/ 64GB of internal storage.